Anderson Bruce G, Fierro-Gonzalez Juan C, Ramesh Kanaparthi, Vinod C P, Niemantsverdriet J W, Gates Bruce C
Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Langmuir. 2006 Apr 25;22(9):4310-4. doi: 10.1021/la0526535.
Mononuclear gold complexes in zeolite NaY were synthesized from initially physisorbed Au(CH3)2(C5H7O2) and characterized by X-ray absorption and infrared spectra recorded as the samples were exposed to flowing CO. X-ray absorption spectra demonstrate the formation of zero-valent gold nanoparticles during the CO treatment. Three new nu(CO) bands grew in during this treatment, at 2070, 2033, and 2000 cm(-1), characteristic of carbonyls of Au0. Because the relative intensities of these bands decreased monotonically when the flow of CO was replaced by flowing He, it is inferred that they correspond to a single Au0(CO)3 species, on low-coordinated Au atoms. This is the first example of an Au0(CO)3 species.
在沸石NaY中，通过最初物理吸附的Au(CH3)2(C5H7O2)合成了单核金配合物，并在样品暴露于流动的CO时，通过X射线吸收和红外光谱对其进行了表征。X射线吸收光谱表明，在CO处理过程中形成了零价金纳米颗粒。在此处理过程中，出现了三个新的ν(CO)谱带，分别位于2070、2033和2000 cm(-1)，这是Au0羰基的特征。由于当CO气流被流动的He取代时，这些谱带的相对强度单调下降，因此推断它们对应于低配位Au原子上的单一Au0(CO)3物种。这是Au0(CO)3物种的首个实例。
